diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index c370431..8f8203c 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -1,8 +1,7 @@
 {
   "permissions": {
     "allow": [
-      "Bash(*:*)",
-      "Bash(*)"
+      "Bash(podman-compose:*)"
     ],
     "deny": [],
     "ask": [],
diff --git a/deploy/docker/Dockerfile.api b/deploy/docker/Dockerfile.api
index e281d4b..1163e46 100644
--- a/deploy/docker/Dockerfile.api
+++ b/deploy/docker/Dockerfile.api
@@ -41,8 +41,14 @@ COPY src/ /app/src/
 COPY config/ /app/config/
 COPY pyproject.toml README.md /app/
 
-# Install the package in editable mode
-RUN pip install --no-cache-dir -e /app
+# Install poetry-core (required for install with pyproject.toml)
+RUN pip install --no-cache-dir poetry-core
+
+# Install the package
+RUN pip install --no-cache-dir /app
+
+# Set PYTHONPATH to ensure module can be imported
+ENV PYTHONPATH=/app/src:$PYTHONPATH
 
 # Create necessary directories
 RUN mkdir -p /app/logs /app/output
diff --git a/deploy/docker/Dockerfile.chat b/deploy/docker/Dockerfile.chat
index 7cd161b..76f32b1 100644
--- a/deploy/docker/Dockerfile.chat
+++ b/deploy/docker/Dockerfile.chat
@@ -37,8 +37,14 @@ COPY src/ /app/src/
 COPY config/ /app/config/
 COPY pyproject.toml README.md /app/
 
-# Install the package in editable mode
-RUN pip install --no-cache-dir -e /app
+# Install poetry-core (required for install with pyproject.toml)
+RUN pip install --no-cache-dir poetry-core
+
+# Install the package
+RUN pip install --no-cache-dir /app
+
+# Set PYTHONPATH to ensure module can be imported
+ENV PYTHONPATH=/app/src:$PYTHONPATH
 
 # Create necessary directories
 RUN mkdir -p /app/logs
diff --git a/deploy/docker/Dockerfile.worker b/deploy/docker/Dockerfile.worker
index c37309b..d718d28 100644
--- a/deploy/docker/Dockerfile.worker
+++ b/deploy/docker/Dockerfile.worker
@@ -41,8 +41,14 @@ COPY src/ /app/src/
 COPY config/ /app/config/
 COPY pyproject.toml README.md /app/
 
-# Install the package in editable mode
-RUN pip install --no-cache-dir -e /app
+# Install poetry-core (required for install with pyproject.toml)
+RUN pip install --no-cache-dir poetry-core
+
+# Install the package
+RUN pip install --no-cache-dir /app
+
+# Set PYTHONPATH to ensure module can be imported
+ENV PYTHONPATH=/app/src:$PYTHONPATH
 
 # Create necessary directories
 RUN mkdir -p /app/logs /app/output
diff --git a/deploy/docker/docker-compose.dev.yml b/deploy/docker/docker-compose.dev.yml
index a13f62a..049e37f 100644
--- a/deploy/docker/docker-compose.dev.yml
+++ b/deploy/docker/docker-compose.dev.yml
@@ -1,9 +1,9 @@
-version: '3.8'
+version: "3.8"
 
 services:
   # MongoDB Database
   mongodb:
-    image: mongo:7-jammy
+    image: docker.io/library/mongo:7-jammy
     container_name: datacenter-docs-mongodb-dev
     ports:
       - "27017:27017"
@@ -24,7 +24,7 @@ services:
 
   # Redis Cache & Message Broker
   redis:
-    image: redis:7-alpine
+    image: docker.io/library/redis:7-alpine
     container_name: datacenter-docs-redis-dev
     ports:
       - "6379:6379"
@@ -123,7 +123,7 @@ services:
 
   # Flower - Celery Monitoring
   flower:
-    image: mher/flower:2.0
+    image: docker.io/mher/flower:2.0
     container_name: datacenter-docs-flower-dev
     ports:
       - "5555:5555"
@@ -145,7 +145,7 @@ services:
       dockerfile: deploy/docker/Dockerfile.frontend
     container_name: datacenter-docs-frontend-dev
     ports:
-      - "80:80"
+      - "8080:80"
     depends_on:
       - api
       - chat
diff --git a/src/datacenter_docs/chat/main.py b/src/datacenter_docs/chat/main.py
new file mode 100644
index 0000000..97474f8
--- /dev/null
+++ b/src/datacenter_docs/chat/main.py
@@ -0,0 +1,59 @@
+"""
+Chat server stub for development.
+
+TODO: Implement full chat server with WebSocket support.
+Currently this is a minimal stub to allow the development environment to start.
+"""
+import logging
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+# Configure logging
+logging.basicConfig(level=logging.INFO)
+logger = logging.getLogger(__name__)
+
+# Create FastAPI app
+app = FastAPI(
+    title="Datacenter Documentation Chat Server",
+    description="WebSocket-based chat interface for documentation queries (STUB - NOT IMPLEMENTED)",
+    version="1.0.0",
+)
+
+# Configure CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # In production, restrict this
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+@app.get("/health")
+async def health_check():
+    """Health check endpoint."""
+    return {"status": "ok", "service": "chat", "implemented": False}
+
+
+@app.get("/")
+async def root():
+    """Root endpoint."""
+    return {
+        "message": "Chat server stub - not yet implemented",
+        "status": "stub",
+        "todo": "Implement WebSocket chat functionality",
+    }
+
+
+# TODO: Implement WebSocket endpoint for chat
+# @app.websocket("/ws")
+# async def websocket_endpoint(websocket: WebSocket):
+#     await websocket.accept()
+#     # Implement chat logic here
+
+
+if __name__ == "__main__":
+    import uvicorn
+
+    logger.info("Starting chat server stub on port 8001...")
+    uvicorn.run(app, host="0.0.0.0", port=8001)